This code system http://terminology.hl7.org/CodeSystem/entformula-additive defines the following codes:

Code Display Definition
lipid Lipid Modular lipid enteral formula component
protein Protein Modular protein enteral formula component
carbohydrate Carbohydrate Modular carbohydrate enteral formula component
fiber Fiber Modular fiber enteral formula component
water Water Added water
<status value="draft"/> <experimental value="false"/> <description value="EnteralFormulaAdditiveType: Codes for the type of modular component such as protein, carbohydrate or fiber to be provided in addition to or mixed with the base formula. This value set is provided as a suggestive example."/> <caseSensitive value="true"/> <content value="complete"/> <concept> <code value="lipid"/> <display value="Lipid"/> <definition value="Modular lipid enteral formula component"/> </concept> <concept> <code value="protein"/> <display value="Protein"/> <definition value="Modular protein enteral formula component"/> </concept> <concept> <code value="carbohydrate"/> <display value="Carbohydrate"/> <definition value="Modular carbohydrate enteral formula component"/> </concept> <concept> <code value="fiber"/> <display value="Fiber"/> <definition value="Modular fiber enteral formula component"/> </concept> <concept> <code value="water"/> <display value="Water"/> <definition value="Added water"/> </concept> </CodeSystem>